Meng Wanzhou, the chief financial officer at the Chinese smartphone company Huawei was arrested in Canada on an an extradition request by the U.S. The U.S. has been investigating whether or not she violated sanctions against Iran.

Her arrest so soon after U.S. President Donald Trump and his Chinese counterpart Xi Jinping agreed to a 90-day trade truce could threaten to derail any potential trade talks between the two countries.

Markets reopened on Thursday after being closed Wednesday to honor former President George H.W. Bush, who died last week.